Document holder used with an accounting machine



J. c. NELSON 3,042,177

DOCUMENT HOLDER USED WITH AN ACCOUNTING MACHINE July 3, 1962 Filed May 2, 1960 Wm H i m E5 ,0 mm W a A a "m W 0 J w United States Patent 3,042,177 DOCUMENT HOLDER USED WITH AN ACCOUNTING MACHINE James C. Nelson, San Gabriel, Calif., assignor to Business Systems Incorporated, Los Angeles, Calif., a corporation of California Filed May 2, 1960, Ser. No. 26,097 18 Claims. (Cl. 197-130) This invention relates to accounting machines, and particularly to a unique type of device for holding a series of checks or other work sheets during an accounting operation.

The machines with which the present invention is concerned are of a well known type having a general appearance somewhat similar to that of a typewriter, and having a platen or feed roller rotatably mounted on a carriage which is shifta-ble laterally in use. The roller acts by rotary and lateral movement to advance a work sheet (any desired type of business form or document) past the writing location, at which numbers or letters are typed on the work sheet under the control of a manually actuable keyboard, or an automatically programmed control system, or some combination of manual and automatic control.

In using an accounting machine of this type, it is fre quently desirable to type simultaneously on several different accounting records, which are placed in the machine with carbon paper therebetween so that a particular pertinent figure is applied in a single operation to all of the sheets. For instance, in recording the wages or salaries paid to a series of employees, it may be desirable to simultaneously type the amount of each payment on three different papers, specifically a journal, an earnings record, and a payroll check. The journal is a relatively large sheet, which is left in the machine for a series of entries, while the earnings records and checks are different for each employee.

In performing this type of accounting operation, it has been noted in the past that a considerable amount of inconvenience is often encountered in the handling of the checks, which must normally be placed on a table or other work surface near the machine, and then be individually picked up from that location and placed in the machine in front of the platen roller to successively type in the amounts payable to the different employees. With this in mind, a major object of the present invention is to provide an arrangement for holding a series of such checks or other work sheets at a location which is extremely convenient to the operator, and which greatly facilitates the successive feeding of the checks by the op erator to the platen roller. Specifically, I utilize for this purpose a novel type of check holder which is mounted on the laterally shiftable carriage by which the roller is rotatably mounted. As the carriage and roller move from side to side during operation of the machine, the check holder also shifts with these parts, and consequently is always in a position of maximum convenience relative to the roller. The holder is desirably located essentially above and behind the location of the roller, so that an operator may easily remove one check from the holder, move the check forwardly a very short distance, and then drop the check into a position ahead of the roller and in front of the journal and/ or earnings record. Preferably, the check holder is detachably mounted on the carriage, desirably by one or more spring clips releasa bly connectible to the upper feed roller bar of the machine. check holder may have an inclined rearwardly and upwardly extending back rest portion, against which the checks rest rearwardly, and with the bottom edges of the checks engaging and being supported by a lower support shoulder extending along the bottom edge of the back The rest portion of the device. At the location of this shoulder, the holder may have a portion extending upwardly at an acute angle to theback rest portion, and on the forward side of which there may be mounted the spring clips or other attaching means by which the device is secured to the carriage of an accounting machine. Also, suitable means may be provided for retaining the checks against displacement relative to the holder during movement of the carriage and roller.

The above and other features and objects of the present invention will be better understood from the following detailed description of the typical embodiment illustrated in .the accompanying drawing in which:

FIG. 1 is a perspective view showing an accounting machine having a check holder constructed in accordance with the invention;

FIG. 2 is an enlarged fragmentary vertical section taken on line 22 of FIGS. 1 and 7;

FIG. 3 is an enlarged perspective view of the check holder;

FIG. 4 is a further enlarged fragmentary front view of the check holder;

FIG. 5 is a vertical section taken on line 5-S of FIG. 4;

FIG. 6 is a perspective view of the retaining element for confining the checks against displacement relative to the holder; and

FIG. 7 is an enlarged fragmentary perspective view of a portion of the accounting machine at one end of the feed roller.

Referring first to FIG. 1, I have shown at 10 an accounting machine which may be of conventional construction except that it removably carries a check holder 11 formed in accordance with the invention. The machine has a body 12 containing the mechanism of the machine, and on which the usual shifting carriage 13 is mounted for lateral horizontal movement. Carriage 13 forms a framework on which the horizontally elongated platen or feed roller 14 is rotatably mounted, this roller 14 normally being formed of rubber or other somewhat deformable material. The rotary axis of roller 14, about which this roller turns relative to the carriage 13, is represented at 15 in FIG. 1, and in FIG. 2 where the roller is shown in greatly enlarged transverse section. The carriage 13 is mounted on guideways carried by body or housing 12 of the machine, these guideways functioning to guide the carriage 13 for only horizontal sliding movement parallel to axis 15 of the roller. The mechanism for typing numbers and letters onto a work sheet positioned on roller 14 is controlled by manually actua'ble keys 16 at the front of the machine and/or automatically programmed instructions.

In addition to the roller 14, carriage 13 also carries certain other parts, which include a series of spaced shiftable small rubber rollers 17 positioned above roller 14 and adapted to bear downwardly against a work sheet to hold it tightly against the roller. This work sheet, designated 18 in FIG. 2, extends forwardly at the bottom of roller 14, then upwardly at the front of the roller and rearwardly from its upper side to the back of the machine. Work sheet 18 may typically be considered as being a journal, which is to be left in the machine while a series of different checks and earnings records are typed. The checks and earnings records are slipped downwardly in front of the roller, as shown at 19 and 20 respectively in FIG. 2, and are temporarily held in place at that location by a retaining member 21 which is shiftable forwardly to the illustrated broken line posi' tion to release the check and earnings record.

For movably mounting the small rollers 17, carriage 13 has two metal mounting elements 24 located at opposite ends of roller 14, each of which elements 24 is pivotally connected at 23 to an associated element 113 {see FIG. 2) which may for present purposes be considered to be a part of the framework of sliding carriage 13, or an element attached thereto. Parts 24 may be thin sheet metal parts having the illustrated generally triangular configuration and lying in planes which extend transversely of axis 15, While the pivotal axes 23 of the two parts 24 are aligned with one another and extend parallel to axis 15. Extending between the two parts 24, there is a rigid channel member 25, having the U-shaped cross-sectional configuration represented in FIG. 2, and with the opposite ends of channel 25 being rigidly secured to the two elements 24 respectively, so that the two parts 24 and part 25 form together a rigid unitary structure adapted to swing bodily about the axis of the pivot points 23.

Forwardly of channel 25, the parts 24 carry a second rigid member 26, which may be of uniform square crosssection as seen in FIG. 2, and on which the rollers 17 are mounted by carriers 27. The opposite ends of member 26 are rigidly secured to parts 24 respectively. Also, as will be apparent, the parts 25 and 26 both extend parallel to axis 15. The carriers 27 are mounted about part 26, and are shiftable along that part, parallel to axis 15. Each of the carriers 27 has a tightening screw 28 by which that particular carrier is secured in fixed position relative to rod 26. The rollers 17 are mounted rotatably on their respective carriers 27, at locations to bear downwardly against the work sheet 18 at the upper side of roller 14. As will be apparent, the rollers 17 turn about a common axis which is parallel to main roller axis 15, and are shiftable longitudinally of roller 14.

When a sheet 18 is being inserted into position on roller 14, the structure formed by parts 24, 25, 26, 27 and 17 is bodily swung upwardly and rearwardly to the broken line position represented in FIG. 2, in which position the rollers 17 are moved away from engagement with roller 14 so that the sheet 18 may be easily slipped into position. After sheet 18 has been placed on roller 14, the structure consisting of parts 24, 25, etc. swings downwardly to the full line position of FIG. 2, so that small rollers 17 thereafter hold sheet 18 in position.

The check holder 11 is desirably mounted on machine by detachably connecting the holder to the rearwardly facing channel member on carriage 13. For this reason, the holder 11 has a pair of spring clips 112 at its forward side (see FIG. 3) which are formed of resilient spring material and are adapted to clamp against the upper and lower sides or webs of channel 25 to retain the holder in position. More specifically, these spring clips 112 both have the vertical cross-sectional configuration shown in FIG. 2, to include a vertical mounting portion 29, and two upper and lower spring fingers 30 and 31 engaging the upper and lower sides of channel member 25. Spring fingers 30 and 31 normally tend to return by their own resilience to a vertical spacing which is less than the vertical dimension of channel member 25, so that in the installed position of HG. 2, the clips 12 clamp tightly against the upper and lower sides of the channel member, to effectively secure the holder to that member. The extremities of spring fingers 30 and 31 curve vertically away from one another, to provide camming portions of the fingers which will deflect the fingers away from one another as the clamps are slipped onto channel member 25.

The body portion of holder 11 is formed of a single piece of sheet metal 32, having a main planar portion 33 which is inclined upwardly and rearwardly as shown. The angle of inclination of this portion 33 in the installed condition may be approximately 45 degrees to the horizontal. Also, this portion 33 is elongated horizontally, in the direction of axis 15 of roller 14, and has a considerably smaller width dimension from its upper edge to its lower edge. Desirably, portion 33 is substantially rectangular.

At the lower edge of portion 33 of the holder, the sheet material of part 32 is turned upwardly to form a forward mounting portion 3.4, which preferably extends directly vertically in the installed condition of the apparatus, and which therefore extends at an acute angle (desirably about 45) relative to portion 33 of the holder. Clips 112 are secured to the forward face of portion 34 at two spaced locations, typically by rivets represented at 35. The portion 34 of the holder preferably is rectangular in shape, and of a length corresponding to the length of the main upper portion 33 of the sheet metal part.

In the figures, there are represented at 19a a series of blank checks, which are superimposed one above the other, and which are to be fed successively to the location represented at 19 in FIG. 2. Each of these checks typically carries a sheet of carbon paper at its forward side, for typing through the earnings record 21 onto the check, and similarly the journal 18 preferably carries a sheet of carbon paper at its forward side for transmitting the typing through to the journal. The checks may have record portions 36 attached toone of their ends at perforated lines 37, and providing records for the employee to retain showing his earnings paid. The main portion 33 of the sheet metal part 32 may have a height dimension which is approximately equal to the height or short dimension of checks 19a. The horizontal length of portion 33 (and also portion 34) should be several times as great as the height of portion 33, say at least about five times the height and preferably approximately six times the height. Preferred dimensions for the portion 33 are a height or shorter dimension of three and one-fourth inches and a horizontal length of twenty inches. The material of sheet metal element 32 is of course rigid to effectively retain its illustrated shape.

For retaining the checks 19:: on holder 11, this holder adjustably carries two retaining elements 38 and 39, for engaging the opposite ends of the checks. Describing first the element 38, this part is formed of resilient spring wire, deformed to the configuration illustrated best in FIG. 6. More particularly, one end of the wire forms an elongated U-shaped loop 40 which extends along and engages the underside of portion 33 of sheet metal part 32, while a portion of the wire near its other end forms a second U-shaped loop 41 extending parallel to and overlying loop 40, and engageable with the upper surface of portion 33 of part 32. At the upper edge of portion 33, these two loops are joined by a loop shaped intermediate portion 42 of the wire which projects forwardly and upwardly, perpendicular to the plane of portion 33 of part 32. The perpendicularly projecting plane of loop 42, in the preferred form of the device, may be considered as intersecting the plane of portion 33 of part 32 at essentially the upper edge of that part 32. Loop 42 thus forms an abutment which is engageable with the upper edges of the checks 19a in a manner confining them against upward movement from the holder.

The extremity of loop 41 of part 38 forms still another U-shaped portion 43 of the wire, which U-shaped portion or loop lies in a plane extending perpendicular to portion 33 of part 32, and extending essentially parallel to the end edges 44 of portion 33. The plane of loop 42 may meet the plane of loop 43 along the line defined by an outer one of the arms 45 of loop 42 (see FIG. 6). The loop 43 forms an abutment or projectlon against which the right ends of the record portions 36 of checks 19a abut laterally, to limit rightward movement of the checks on the holder.

The lefthand retainer element 39 may be considered as identical with the above described righthand retainer 38, except that element 39 is a reversal of part 38. That is, the upper loop 41a of part 39 is connected to the righthand side of loop 42a, rather than its lefthand side as in part 38, so that the lateral retaining loop 43a may be in engagement with the left edges of checks 19a while the upper loop 42a is in engagement with the upper edges of the checks. The bottom loop of part 39 (corresponding to loop 49 in FIG. 6) is connected to the lefthand side of loop 42a, rather than its righthand side. In the case of both of the two retainer elements 38 and 39, the upper and lower loops (4% and 41 in FIG. 6) are resiliently urged toward one another to a spacing smaller than the thickness of portion 33 of part 32, to thereby clamp parts 38 and 39 in any set position on portion 33, while at the same time allowing for easy lateral adjustment of these parts to accommodate different sizes of checks if desired.

To now describe the use of the device, assume that it is desired to write a series of payroll checks as previously discussed, and for each check to type a payroll record as shown at 20, and make an entry on the relatively large journal sheet 18. When this type of operation is desired, the operator may first swing the structure 24, 25, 26, etc. to the upwardly retracted broken line position of FIG. 2, following which journal sheet 18 may be easily inserted into the machine and about roller 14. The operator then swings structure 24, 25, etc. downwardly to the full line position of FIG. 2, so that rollers 17 engage the sheet 18 at the upper side of roller 14 and hold the sheet in position. With the structure 24, 25, etc. in the full line position, the operator attaches holder 11 to that structure, by slipping spring clips 12 forwardly over channel member 25 and into gripping engagement therewith. The holder is properly centered laterally relative to roller 14, and the stack of checks 19a is placed on the holder in the position illustrated in the figures. In this condition, the lower edges of the checks engage the upstanding portion 34 of part 32, and since the checks are not secured together in any way, this causes the upper checks to be shifted slightly in a direction toward their upper edges, relative to the other checks. This effect is caused by the fact that the angle a between lower portion 34 of part 32 and the main portion 33 of that part is an acute angle, less than 90 degrees. Also, this effect is progressive so that each check is shifted slightly upwardly toward its upper edge relative to the next lower check, as indicated by the angulan'ty of the line defined by the upper edges at 46 in FIG. 5. Such relative positioning of the diiferent checks is of considerable importance in the present invention, since it so positions the uppermost check that its top edge can be fingered and grasped by an operator without his unintentionally picking up any of the other checks. Thus, all of the checks are automatically held in a feathered position to facilitate the movement of a single check from the holder into the machine.

Before each typing operation, the operator places one of the earnings record sheets 29 in position in front of sheet 18 and roller 14, and also places one of the checks from stack 19a in position behind sheet 29, following which element 21 is closed to hold the sheets in their desired positions, and the typing mechanism is actuated to print on all of the three sheets the desired information. The operator then removes sheets 19 and 20, and inserts the next successive check and earnings record for the next typing operation. The unique placement of check holder 11 in very close proximity to roller 14, and in a position to actually move laterally with the roller, enables the checks to be fed from holder 11 to the roller in the minimum amount of time and with maximum convenience.

While the device 11 is especially useful for holding checks, it is also contemplated that the device may be utilized for holding other types of work sheets or documents at the illustrated location relative to the carriageand feed roller.

I claim:

1. The combination comprising an accounting machine having a carriage mounted for lateral shifting movement and carrying a rotatable platen roller, a holder for receiving and supporting a stack of work sheets to be used successively in said machine, and a connection attaching said holder to said carriage for lateral shifting movement therewith and at a location near said platen to facilitate feeding of the work sheets from said holder to the platen, said carriage including an elongated shiftable member extending essentially parallel to said roller near the upper side thereof, a series of smaller rollers for pressing a work sheet against the first mentioned roller and mounted for shifting movement relative to the carriage and first mentioned roller with said elongated member, said connection including a connector element on the holder detachably connectible to said shiftable member to removably mount the holder thereon.

'2. The combination comprising an accounting machine having a carriage mounted for lateral shifting movement and carrying a rotatable platen roller, a holder for receiving and supporting a stack of work sheets to be used successively in said machine, and a connection attaching said holder to said carriage for lateral shifting movement therewith and at a location near said platen to facilitate feeding of the work sheets from said holder to the platen, said holder being formed of sheet material having a rearwardly and upwardly inclined first portion against which work sheets mounted on the holder may rest, said sheet material being bent upwardly at the lower edge of said first portion to form a second portion extending essentially vertically and at an acute angle to the first portion, said connection including a pair of spring clips mounted on the forward side of said second portion of the holder and detachably connectible to said carriage.

3. A holder having a thin back rest extending essentially upwardly and rearwardly and against which a plurality of work sheets are to rest, and a retaining element formed of wire bent to have front and rear portions at the front and rear sides respectively of said back rest with the latter confined between said portions to locate said element relative to the back rest, said front portion being deformed to form a projection extending forwardly at a location to confine the work sheets against lateral movement.

4. A holder having a thin back rest extending essentially upwardly and rearwardly and against which a plurality of work sheets are to rest, and a retaining element formed of wire bent to have front and rear portions at the front and rear sides respectively of said back rest with the latter confined between said portions to locate said element relative to the back rest, said front portion being deformed to form a projection extending forwardly at a location to confine the work sheets against lateral movement, and said wire forming also a second projection extending forwardly above the work sheets to confine them against upward movement.

5. For use with an accounting machine having a carriage mounted for lateral shifting movement and carrying a rotatable platen roller; a holder for receiving and supporting a stack of work sheets to be used successively in said machine, connector means on said holder for detachably connecting the holder to said carriage at a location near said platen to facilitate feeding of the work sheets from the holder to the platen, said holder having a rearwardly and upwardly inclined back portion against which work sheets mounted on the holder may rest, said holder including two spaced locating units formed of wire and shiftably mounted on said back portion of the holder and each forming an upper projection positioned to limit upward movement of the work sheets and a second projection positioned to limit lateral movement of the work sheets.

6. The combination comprising an accounting machine having a carriage mounted for lateral shifting movement and carrying a rotatable platen roller, a holder for receiving and supporting a stack of work sheets to be used successively in said machine, and a connection attaching said holder to said carriage for lateral shifting movement therewith and at a location near said platen to facilitate feeding of the work sheets from said holder to the platen, said carriage including an elongated shiftable member extending essentially parallel to said roller near the upper side thereof, a series of smaller rollers for pressing a work sheet against the first mentioned roller and mounted for shifting movement relative to the carriage and toward and away from said first mentioned roller with said elongated member, said connection including means for attaching said holder to said shiftable member.

7. The combination comprising an accounting machine having a carriage mounted for lateral shifting movement and carrying a rotatable platen roller, a holder for receiving and supporting a stack of work sheets to be used successively in said machine, and a connection attaching said holder to said carriage for lateral shifting movement therewith and at a location near said platen to facilitate feeding of the work sheets from said holder to the platen, said carriage including an elongated shift-able member extending essentially parallel to said roller near the upper side thereof, a series of smaller rollers for pressing a work sheet against the first mentioned roller and mounted for shifting movement relative to the carriage and toward and away from said first mentioned roller with said elongated member, said holder having an upwardly extending first portion against which work sheets on the holder may rest rearwardly, and having a second portion extending generally upwardly from the lower edge of said first portion for engaging the lower edges of said work sheets, said connection including means carried by said second portion of the holder at a forward side thereof for attaching said holder to said shiftable member.

8. The combination comprising an accounting machine having a carriage mounted for lateral shifting movement and carrying a rotatable platen roller, a holder for receiving and supporting a stack of work sheets to be used successively in said machine, and a connection attaching said holder to said carriage for lateral shifting movement therewith and at a location near said platen to facilitate feeding of the work sheets from said holder to the platen, said carriage including an elongated shiftable member extending essentially parallel to said roller near the upper side thereof, a series of smaller rollers for pressing a work sheet against the first mentioned roller and mounted for shifting movement relative to the carriage and toward and away from said first mentioned roller with said elongated member, said holder having an upwardly extending first portion against which work sheets on the holder may rest rearwardly, and having a second portion extendin generally upwardly from the lower edge of said first portion for engaging the lower edges of said work sheets, said connection including a plurality of spring clips mounted on the forward side of said second portion of the holder and detachably connectible to said shiftable member to mount the holder thereon.

9. The combination comprising an accounting machine having a carriage mounted for lateral shifting movement and carrying a rotatable platen roller, a holder for receiving and supporting a stack of work sheets to be used successively in said machine, and a connection attaching said holder to said carriage for lateral shifting movement therewith and at a location near said platen to facilitate feeding of the work sheets from said holder to the platen, said carriage including an elongated shiftable member extending essentially parallel to said roller near the upper side thereof, a series of smaller rollers for pressing a work sheet against the first mentioned roller and mounted for shifting movement relative to the carriage and toward and away from said first mentioned roller with said elongated member, said connection including a plurality of spring clips on said holder detachably connectible to said shiftable member to mount the holder thereon.

10. For use with an accounting machine having a carriage mounted for lateral shifting movement and carrying a rotatable platen roller and an elongated member adjacent said roller carrying additional rollers and shiftable therewith toward and away from said first roller; a holder for receiving and supporting a stack of work sheets to be used successively in said machine, and a connection for attaching said holder to said carriage for lateral shifting movement therewith and at a location near said platen to facilitate feeding of the work sheets from said holder to the platen, said connection including a connector element on the holder for detachably connecting said holder to said shiftable member.

11. For use with an accounting machine having a carriage mounted for lateral shifting movement and carrying a platen roller; the combination comprising a holder for receiving and supporting a stack of work sheets to be used successively in said machine, and a connection attaching said holder to said carriage for lateral shifting movement therewith and at a location near said platen to facilitate feeding of the work sheets from said holder to the platen, said holder being formed of sheet material having a rearwardly and upwardly inclined first portion against which work sheets mounted on the holder may rest, said sheet material being 'bent upwardly at the lower edge of said first portion to formv a second portion extending essentially vertically and at an acute angle to the first portion, said connection including a pair of spring clips mounted on the forward side of said second portion of the holder and detachably connectible to said carriage.

12. For use with an accounting machine having a carriage mounted for lateral shifting movement and carrying a rotatable platen roller; a holder for receiving and supporting a stack of work sheets to be used successively in said machine, and connector means on said holder for detachably connecting the holder to said carriage at a location near said platen to facilitate feeding of the work sheets from the holder to the platen, said holder having a rearwardly and upwardly inclined back portion against which work sheets mounted on the holder may rest, and said holder including at least one locating unit mounted on said back portion and movable relative thereto and projecting forwardly therefrom to engage and locate the work sheets adjacent said back portion.

13. A holder having a thin back rest extending essentially upwardly and rearwardly and against which a plurality of work sheets are to rest, and a retaining element having front and rear portions received at the front and rear sides respectively of said back rest to confine the latter therebetween and thereby locate said element relative to the back rest, said element forming a projection extending forwardly of said back rest at a location to confine said work sheets against lateral movement.

14. A holder having a thin back rest extending essentially upwardly and rearwardly and against which a plurality of work sheets are to rest, and a retaining element having front and rear portions received at the front and rear sides respectively of said back rest to confine the latter therebetween and thereby locate said element relative to the back rest, said element forming a projection extending forwardly of said back rest at a location above said work sheets to confine them against upward movement. i

15. A holder having a thin back rest extending essentially upwardly and rearwardly and against which a plurality of work sheets are to rest, and a retaining element having front and rear portions received at the front and rear sides respectively of said back rest to confine the latter therebetween and thereby locate said element relative to the back rest, said element forming a projection extending forwardly of said back rest at a location to confine said work sheets against lateral movement, said element forming also a second projection extending forwardly above the work sheets to confine them against upward movement.

16. A holder having a thin back rest extending essentially upwardly and rearwardly and against which a plurality of work sheets are to rest, and a retaining element formed of wire bent to have front and rear portions at the front and rear sides respectively of said back rest with the latter confined between said portions to locate said element relative to the back rest, said wire forming a projection extending forwardly above the work sheets to confine them against upward movement.

17. A holder having a thin back rest extending essentially upwardly and rearwardly and against which a plurality of work sheets are to rest, and a retaining element formed of wire bent to have front and rear generally U-shaped portions at the front and rear sides respectively of said back rest with the latter confined between said portions to locate said element relative to the back rest, said front U-shaped portion having a terminal portion at a location spaced beneath the upper edge of said back rest and forming a loop projecting forwardly at a location to confine the work sheets against lateral movement.

18. A holder having a thin back rest extending essentially upwardly and rearwardly and against which a plurality of work sheets are to rest, and a retaining element formed of wire bent to have front and rear generally U-shaped portions at the front and rear sides respectively of said back rest with the latter confined between said portions to locate said element relative to the back rest, said front U-shaped portion having a terminal portion at a location spaced beneath the upper edge of said back rest and forming a loop projecting forwardly at a location to confine the work sheets against lateral movement, said wire forming a generally U-shaped loop interconnecting and extending between said two first mentioned U-shaped portions at said upper edge of the back rest and projecting forwardly above the work sheets to confine them against upward movement.

References Cited in the file of this patent UNETED STATES PATENTS 881,126 Hutches Mar. 10, 1908 1,642,272 Smith Sept. 13, 1927 1,900,982 Dreyer Mar. 14, 1933 

